Carbureter.



D D. BUICK.

CARBURETER.

APPLICATION FILED OCT. 28. 1914 Patented Nov. 30, 1915.

DAVID l. BUILK, OF LOS ANGELES, CALIFORNIA.

CARBURETER.

Specification of Letters Patent. A Patented Nov, 30, 1915,

Appiication filed October 28, 1914. Serial No. 868,990.

in known that l, .UAJID Di BUICK, a citiw-n oi the limited States, rcsiding at Los nthin the county of Losi ingclcs, State iiiornizh have invented new and useful 1: 1| s'p rilication.

invention relates to a cariniretcr.

th invention to proin winch thc IHOPQLtiOI) Y our gs. ms mixture will be automaticaii rcgniatcn' according to the extint of owning of n. throttle disposed in the commuii i. tween the carburetor and the innnnni'nid of an internal combustion ZUHZE.

,V rarhnwting rhunihcr and ha ing connections I i fii hr the damper controliing tho flow voistiic liquid to the carhnreting chamber acrorriim'r to thcxteut of opening of tho tiikiilywh fihiiil .hv fluctuations of suction i a variations of drawing :10-

. lnc pistons will be compcninsuring a uniform explosive drawninto the engine cyling the flow of volatile rbureting chamber of pted to be opcratcd 2' i aultmmtic opening of an air inlet 'iliing d. m dr to roportion the air l for controiiir liquid inc: into the army of the air iiiirt. hci' Oijfljtfi. to an; show c. tor comprising 1w; wt: which may be readily nssen'v awed and which can in: econom menu-ms in ifnrl'mretcrs, of which the i to provide a carhurcter I nothcr object is to provide a valve mech- 'nrgmd tnsi. according to the extent or novidc a carbureter ically manufactured so as to produce a carburetcr which can be marketed at small cost.

The invention is illustrated'in the accompanying drawing, in which:

Figure l is a side view of the carburetor with parts broken away. F ig. 2 is a view of same in vertical section partly in elevation scen on the line 22 of Fig. 1. in the dircr ion indicated by the arrows. Fig 3 1s a horizontal section and plan view as seen on the line 3--3 of Fig. 2. Fig. 4 is an enlarged detail section and elevation on the line 4--1 of Fig. 2.

More specifically, 5 indicates the intake manifoid of an internal combustion engine to which the carburetor constituting the present invention is attached by means of screws 6, and 7 indicates the upper tubular portion of the carbureter casing attached to the manifold The casing 7 is formed with a cylindrical passage 8 across which a rock shaft 9 extends and mounted on the rock shaft is a disk 10 disposed across the passage 8 to form. a throttle for regulating the vol ume of gaseous mixture drawn in to the manifold 5 from the mixing chamber of the carburetor. The throttle valve 10 is opcr atcd and. its position adjusted by means of an arm 11 mounted on the rock shaft 9 and connected to any suitable operating means by which the rock shaft 9 can be actuated to dispose the throttle 10 in any desired position. The throttle is designed to not completely close the passage 8 when in its closed position, being limited in its movement in the closing direction by means of a set screw 12 threaded in a projection 13 on the arm 11 and adapted to abut agcinrt 14 on the casing 7. v

The carbureting chamber in of tho carhureter is formed in the Portion 7 below the throttle '10 and opens to the atmosphere through an intake opening 17 "formed in the side of the casing member '5'; the bottom walls of the mixing chamber 16 converging downwardly and terminating in a sleeve 18 having a vertically extending bore 19 adapt ed to receive a reciprocating valve '20. Tho 'valve 20 is tubular in form and has its open lower end projecting into a volatile liquid receiving chamber 21 formed by a casing member attached to the member T and depending-g therebcnenth.

The amps! and oil the valve 20 forn'wd with 1; iricted aperture 23 which forms.a

shou ldsr communication between the interior of the tubular valve 20 and the carbureting chamber 16, and formed in the side walls of the valve 20 is a series of perforations 24 arranged longitudinally of the latter at suitable distances apart; the uppermost perforation 24: being normally closed by the Wall of the sleeve 18 as particularly shown in Fig. 4. These perforations 24 are designed to open communication between the chamber 21 and'the carbureting chamber 16 through the tubular valve member 20 when the latter is moved upwardly in the sleeve 18 so as to vary the quantity of volatile liquid drawn into the carbureting to the air admitted thereto.

Extending into the carbureting chamber 16 across the inlet opening 17 is a damper 25 which normally contacts the side walls of the carbureting chamber and abuts against the inclined bottom wall 26 of th latter as shown in F ig. 2. The damper 25 is formed with an outwardly and downwardlyextendins, arm 27 which is pivoted at its lower end to a pivot pin 28 on a plane intermediate the upper and lower edges of the damper 25 in such manner that when the arm 27 is rocked rearwardly the lower edge of the damper 25 will move on an approximately vertical plane, and thereby avoid choking or restricting the carbureting chamber. The damper 25 is normally maintained in its seated position by means of a coiled spring 29 one end of which bears against the arm 27 while the opposite end seats against a rigid bracket 30 carried by the casing member 21. The damper 25 is connected to the valve 20 in such manner that movement of the damper 25 will effect a reciprocal movement of the valve 20; the connections between the damper 25 and the valve 20 consisting of a pair of lugs 31 formed on the inner face of the damper 25 adjacent its lower end and oppositely extending studs 32 on the upper end of the valve 20 which extend into open- 'ended slots 33 formed on the lugs 31.

The chamber/21 communicates with a suitable source of volatile liquid supply through a nipple 34 formed on the casing member 22 and mounted in the chamber 21 is a float 35 adapted to control any suitable valve mechanism for regulating the depth of the volatile liquid in the chamber 21. A drain cock 36 is provided in the bottom of the casing member 22 to drain the chamber 21 when required.

As a means for admitting air to the car buretingchamber 16 when the damper 2 is closed to form a gaseous mixture in the carbureting chamber when the throttle 10 is in its closed position and the engine running idle an aperture 37 is formed in the damper 25 on the lower edge thereof. This aperture 37 and the opening 23 in the top of'the valve 20 se t ve as intake openings for the chamber in proportion passage of air and volatile liquid into the carbureting chamber 16 when the suction in the latter is not sufiicient to effect opening of the damper 25 as when the engine is run ning slow or idling with the throttle 10 in its closed position; the throttle 14 being normally opensufficiently to permit a slight suction occurring in the carburetine hamber when it is closed and the engine s in operation. By this arrangement open ing the throttle valve 10 n xplns': m x ture will be immediately drawn the manifold .8 to charge the engine c} i2 In the operation of the invertmn when the throttle 10 is open and suction in duced inothe manifold 5 a reduction of a; pressure below normal atmospheric [WEQEQIQ will be effected in the carbureting rh-gnubcr 16, thereby causing the damper 25am move upwardly on its pivotal mounting l in opposition to the spring the inrush of a volume intake opening 17 29 thus permitting of air through the into the carbureting chamber 16; the extent of opening of the damper 25 being gree of suction induced in the carbureting chamber 16, which in turn is regulatedby the extent of opening of the throttle ll and the suction induced by engine pistons. The upward movement of the damper 25 effects a corresponding upward movement of the valve 20 so as to dispose one or more of the perfqrations 24 within the carbureting chamber 16, according to the extent of opening of the damper whereupon the suction induced in the chamber 16 will operate to draw a quantity of the volatile liquid from chamber 21 into the carbureting chamber 16 through the tubular valve 20 proportional to the de and the open perforation 23 and such of i i the perforations 2& as are opened to the chamber 16. By this construction the quantity of volatile liquid drawn into the chamber 16 will be proportionai. to the amount of air entering the carbureting chamber 16 which in turn is regulated by the extent of opening of the damper 25.

By positioning the uppermost perforation 2i so as to be normally closed by the sleeve 18 the damper 25 must be necessarily ele vatcd a short distance before volatile liquid will be drawn into the carbureting chamber 16 through the perforation 24., thus insuring a volume of-air being admitted to the carbureting chamber 16 tile liquid passing through the first or uppermost perforation 24; an initial charge of the volatile liquid passing through the perin advance of the volaforation 23 and this charge being augv owe ' li uid mcli'in rin s.

outlet openip What ll claim is: r

1. In :1 eerbnreter, a casing formed with a. earbureting chamber having an air inlet opening, a fuel inlet opening and a mixture g, n pivoted shutter controlling the air inieopening compzising a closure plate disposed parallel to its pivotal axis for oscillating sli ing movement on its seat,

- a tubular piston valve extending into the fuel inlet opening and having a plurality of perforations adapted to be .successively opened to the carbureting chamber, and means connecting the shutter and tubular piston valve whereby opening of the shutter will etfect a reciprocating movement of the piston valve to automatically directly pro portion the quantity offuel to the volume of air entering the curbureting chamber. In a carburetor, a casing formed with a cnrbiireting chamber having an air inlet opening, a fuel inlet opening and a mixture outlet, on ossillatlng gate valve controlling the air inlet opening, comprising uclosure plate disposed parallel to its pivotal axis, a

tubular piston "valve extending intothe fuel inlet opening and having a pluralityoflperforatiens adapted to be successively? opened' to the earburetmg chamber, and anurm se-.

cured to said oscillating gate valve and engaging the tubular piston.

In a cnrbureter, a casing formed with a czu'bureting chamber having an air inlet opening, a fuel inlet opening, and a, mixture outlet opening, a pivotal shutter controlling the air inlet opening, comprising a closure plate disposed parallel to its pivotal axis, a tubular piston valve extending into the fuel opening provided with trunnlons, and having a plurality of perforations adapted to be successively opened .to the carbureting chamber, and a yokesecured to-the shutter provided with slots in the arms thereof in which said trunnions are disposed.

111- Witness that I claim the foregoing I (lay oil-October, 1914.

i DAVID D. BUICK. Witnesses:

x MAIIUUERITE BATES,

Mlinnz BA' 'rnY.

hereuntosubscribed my name this 16th 

